对象内动态属性名的值获取

// path
form.list.0.title         


/**
         *
         * @param {String} obj
         * @param {String} path
         * @param {Number} nums
         */
        $_setLimit: function(obj, path, nums) {
            let temObj = obj;
            let keyArr = path.split(".");
            let val = keyArr.reduce((cur, next) => {
                 return cur[next];
            }, this[temObj]);
        }